YouTube is already established as the world’s most popular video site. To that point, it sees more than one billion unique visitors each month, many of whom go in search of funny videos or music, but there’s a whole lot more to it. The Google-owned site is a window into the world, an opportunity for content creators to reach national and global audiences. It can turn a hobby into a profession, but YouTube is equally a_place_for established names from traditional media circles. PSY is perhaps the most famous example. Last year, the Korean pop star’s Gangnam Style song become a...

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